code: def pos_tag(self, tokens):
      return nltk.pos_tag(tokens)
  
file_path: nlpaug/nlpaug/model/word_dict/ppdb.py
imports: from nlpaug.util import PartOfSpeech
  from nlpaug.model.word_dict import WordDictionary
label_desc: Use image node_id 6 for calling the Ppdb obj's underlying member method code with example usage: obj.pos_tag(tokens) and returns: nltk